Password Generator
Generate strong, secure random passwords with customizable length, character sets, and entropy calculation. All processing happens in your browser.
Character Types
Features
Cryptographically Secure
Uses crypto.getRandomValues() for true randomness, not Math.random().
Customizable Length
Adjust password length from 4 to 128 characters with a smooth slider.
Character Sets
Choose uppercase, lowercase, numbers, symbols, or add your own custom characters.
Strength Indicator
Visual strength bar with entropy calculation shows how crackable your password is.
Batch Generation
Generate up to 20 passwords at once and copy any of them with a single click.
100% Client-Side
All passwords are generated in your browser. Nothing is ever sent to a server.
Generate Strong, Secure Passwords Instantly
A strong password is your first line of defense against unauthorized access to your accounts and data. Our free Password Generator uses cryptographically secure random number generation to create passwords that are practically impossible to guess. Unlike dictionary words or common patterns, randomly generated passwords resist brute-force attacks, dictionary attacks, and social engineering.
Customize every aspect of your password: choose the length from 4 to 128 characters, select which character types to include, add your own custom characters, and exclude ambiguous characters that are easy to confuse. The built-in entropy calculator tells you exactly how strong your password is in bits, and the visual strength indicator gives you an at-a-glance assessment.
Security experts recommend passwords with at least 80 bits of entropy for sensitive accounts. With our generator, you can easily create passwords that exceed this threshold. Generate multiple passwords at once, compare them, and copy your favorite with a single click. Everything runs entirely in your browser — no data is ever transmitted.
Frequently Asked Questions
How secure are the passwords generated by this tool?▾
Very secure. This tool uses the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure random numbers. The passwords are generated entirely in your browser and are never transmitted over the internet.
What is password entropy?▾
Password entropy measures how unpredictable a password is, expressed in bits. It is calculated as length × log₂(pool size). Higher entropy means more possible combinations and a harder password to crack. For example, a 16-character password using all character types has about 105 bits of entropy.
How long should my password be?▾
Security experts recommend at least 12 characters for most accounts and 16+ characters for sensitive ones. Longer passwords are exponentially harder to crack. Combined with a mix of character types, a 16+ character password is considered very strong.
Should I use a password manager instead?▾
A password manager is an excellent complement to a password generator. Use this generator to create strong passwords, then store them in a password manager so you only need to remember one master password. Many password managers also include built-in generators.
What are ambiguous characters and why exclude them?▾
Ambiguous characters like 0 (zero), O (capital o), l (lowercase L), 1 (one), and I (capital i) look similar in many fonts. Excluding them makes passwords easier to read, type, and share verbally without confusion.
Learn more about password security
Read our guides on password best practices, entropy, and how generators work.
Read the Blog